Purifying apparatus for liquids.



No. 851,778. PATENTED APR. 30, 1907. G. SCHMIDT.

PURIFYING APPARATUS FOR LIQUIDS.

APPLICATION FILED JUNE 9. 1906.

2 SHEETS-SHEETI.

AND-851,778. PATBNTED APR 30, 1907. G. SCHMIDT.

PURIPYING APPARATUS FOR LIQUIDS.

APPLIUATION mum mum. 1906.

2 SHEETS-SHEET 2.

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.from the water UNITED STATES PATENT OFFICE.

CARL SCHMIDT, OF VIENNA, AUSTRIA-HUNGARY.

PURIFYING APPARATUS FOR LIQUIDS- Application filed June 9.].

To all whom it may concern:

Be it known that I, CARL SCHMIDT, a subject oi." the Emperor ofAustria-Hungary, rel Austria-I-Iurigary, have inand useful Improvementsin Feeders of Precipitants for IVater-Purifyl ing Apparatus, of whichthe following is a clear, full, and exact specification.

This invention relates to a feeder for puri- 5 vented certain new tyingapparatus for water or other liquids in 1 powdery precipitatingsubstances is conveyed by means of a, worm arranged in the tankcontaining the precipitating substances, and is then mixed with thewater'in quantities necessary to dissolve it. In the ordinary waterpurifying appa- I ratus of this kind, it frequently happens that largeparticles, more particularly of lime, re-

which a supply of dry main undissolved and are carried away each timethat the slime is discharged, so that a considerable portion of theprecipitating substance is lost. There is also the drawback that, owingto the increased quantity conveyed .by the worm, the precipitatingsubstances are pressed forward toward the end of the tank and packed, sothat the worm is stopped bythe resistance thus produced. The object ofthis invention is to do away with the above designated inconveniences.

A construction according to this invention is illustrated, by way ofexample, in the accompanying drawing, in which:

Figure. 1 is a partial longitudinal section. Fi 2 is-a cross-section.-Fi 3 another partia longitudinal section, an Fig. 4 a plan Specificationof Letters Patent.

Patented April 30, 1907.

906. Serial No. 321,074.

'for this reason large, incompletely dissolved particles of theprecipitating agent cannot escape from the tank 42.

The conveyer worm b is provided near the outlet opening f, with threadin opposite direction to the thread throughout its length, so that theprecipitating substance conveye .forward, cannot be pressed against theend wall, as the reversed front thread will always work back toward theoutlet opening j.

When the apparatus is in operation, the precipitating substance escapingthrough the opening f, together with the water introduced by the pipe i,the quantity of which is regulated by the cock it, passes into thecasing e, and is therein dissolved or slaked, and gradually movedbackward by the conveyer d; all larger particles of the precipitatingsubstance are completely (ground and dissolved and in that state mixewith the water to be purified whch passes from the watermotor through achute Z, into a tank below, not shown.

The pipe '8 conveys only the quantity of water re uired for the completesolution or slaking or the precipitating substance.

Having thus described my invention, what I claim is A feeder ofchemicals for water purifying apparatus, comprising a compartment aforthe dry chemicals with a feed worm at the bottom, extending from theoutlet opening f to the end wall with thread in one direction and fromsaid opening to the opposite end with thread in opposite direction, acompartment e, below the compartment (1 with feed view of an apparatusaccording to this invention.

The apparatus consists of a tank or vessel a for the precipitatingchemicalsin which is arranged the conveyer worm b driven in well knownmanner, say, by a water pressure mo- 1 tor 0. Under the tank a is arraned a conveyer d placed in a casing e and a so driven by the water motor.This casing is provided, under the outlet opening f of the tank a, withan enlargement g open at the top. A ipe t, the cross-section of which isregulated by a cock h and which is supphed with water motor casing,opens into the In the end wall of the easing e there is an opening 7c,the lower edge of which does not quite reach the bottom, and

enlargement g.

opening 9 at one end under the opening a water supply pipe i with cock hto a mit water for wetting and dissolving a dry chemical, falling downfrom the compartment a, a feed screw (1 in the casing 0 driving thechemicals mixed with the water from the opening 9 at one end towardanopening in the opposite end wall is, having its the bottom of thecasing a; and means to impart motion to the feed screws, substantiallyas described and for the purpose set forth.

In testimony whereof I aflix my signature.

CARL SCHMIDT. In the presence of- ULYSSES J. BYWATER, LOUIS F. MUELLER.

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